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When artery muscles contract, _____.

: the opening becomes smaller, and less blood flows through
: the opening becomes larger, and less blood flows through
: the opening becomes smaller, and more blood flows through
: the opening becomes larger, and more blood flows through

User Shenouda
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the opening becomes smaller, and less blood flows through

When the artery contracts, it gets tighter and smaller. Since there is less space, less blood flows through.
User Jilyan
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